Low voltage electrical appliances in Optical Fiber Distribution Box are composed of fuses, AC contactors, residual current action protectors, capacitors and meters. These low-voltage electrical appliances are designed and manufactured according to GB1497 “Basic Standard for Low-voltage Electrical Appliances”, and their normal working conditions are stipulated accordingly: the upper limit of ambient air temperature shall not exceed 40℃; The average ambient air temperature for 24 hours shall not exceed 35℃; The lower limit of ambient air temperature is not lower than -5℃ or -25℃.
The optical fiber distribution box modified by the rural power grid operates outdoors. It not only generates high temperature under direct sunlight, but also generates heat during operation. Therefore, the temperature in the box will reach above 60℃ in the high-temperature season of midsummer. The temperature at this time greatly exceeds the ambient temperature specified by these electrical appliances, thus causing faults due to overheating of electrical components in the optical fiber distribution box.
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Tags: China Fiber Optic Splice Closure Manufacturers, Optical Fiber Distribution Box
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